Power supply device

Abstract

To provide a power supply device capable of supplying power generated from natural energy to a power-supply target more stably.SOLUTION: A power supply device 1 includes switching means M1 that can switch between: one state in which generated power generated by a natural energy power generation device, which generates power by converting natural energy into electrical power, is charged to a first storage battery 40 while a second discharge power discharged from a second storage battery 50 is output to an output unit 90; and another state in which the generated power is charged to the second storage battery 50 while a discharge power discharged from the first storage battery 40 is output to the output unit 90.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a power supply device. [Background technology]

[0002] Conventionally, there are power supply devices that supply power generated from natural energy sources such as sunlight. The amount of power generated from natural energy sources varies depending on natural conditions. For example, in solar power generation, the amount of solar radiation varies depending on the time of day (e.g., daytime or nighttime) and weather conditions (e.g., sunny or cloudy), and the amount of power generated also varies depending on the amount of solar radiation. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-5616 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in conventional power supply devices, when there is a surplus of power generated based on natural energy for the power supply target, the power is supplied from the power generation device, and when there is a shortage of generated power, discharged power is supplied from the storage battery.In addition to the generated power changing depending on natural conditions, the power supply source switching between the power generation device and the storage battery can cause output to become unstable.

[0005] Therefore, an object of an embodiment of the present invention is to provide a power supply device that can more stably supply power generated based on natural energy to a power supply target. [Means for solving the problem]

[0006] The power supply device of the embodiment has a switching means that can switch between one state in which the generated power generated by a natural energy power generation device that generates power by converting natural energy into electricity is charged into a first storage battery, and the second discharged power discharged by a second storage battery is output to an output unit, or the other state in which the generated power is charged into the second storage battery, and the discharged power discharged by the first storage battery is output to the output unit. [Effects of the Invention]

[0007] According to an embodiment of the present invention, it is possible to provide a power supply device that can more stably supply power generated based on natural energy to a power supply target. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a circuit diagram illustrating an example of a power supply device according to a first embodiment. [Figure 2] 4 is an explanatory diagram for explaining an example of a current flow when the switching means of the power supply device according to the first embodiment is in one state. FIG. [Figure 3] 5 is an explanatory diagram for explaining an example of a current flow when the switching means of the power supply device according to the first embodiment is in the other state. FIG. [Figure 4] FIG. 10 is a circuit diagram illustrating an example of a power supply device according to a second embodiment. [Figure 5] FIG. 10 is an explanatory diagram illustrating an example of a current flow when the switching means of the power supply device according to the second embodiment is in one state. [Figure 6] FIG. 10 is an explanatory diagram for explaining an example of a current flow when the switching means of the power supply device according to the second embodiment is in the other state. [Figure 7] FIG. 10 is a circuit diagram illustrating an example of a power supply device according to a third embodiment. [Figure 8] FIG. 10 is a block diagram showing an example of a drive unit in a power supply device according to a third embodiment. [Figure 9] FIG. 11 is an explanatory diagram illustrating an example of a current flow when the switching means of the power supply device according to the third embodiment is in one state. [Figure 10] FIG. 11 is an explanatory diagram for explaining an example of a current flow when the switching means of the power supply device according to the third embodiment is in the other state. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments will be described with reference to the drawings.

[0010] (Configuration of the first embodiment) Fig. 1 is a circuit diagram showing an example of a power supply device 1 according to embodiment 1. Fig. 2 and Fig. 3 are explanatory diagrams for explaining an example of a current flow in the switching means M1, with Fig. 2 showing one state and Fig. 3 showing the other state.

[0011] 1, the power supply device 1 includes a solar cell module 10, which is a natural energy power generation device, a first switching unit 20, a second switching unit 30, a first storage battery 40, a second storage battery 50, an inverter 60, a rectifying unit 70, an external connection terminal 80, and an output unit 90. The first switching unit 20 and the second switching unit 30 form a switching means M1.

[0012] The solar cell module 10 converts solar energy into electricity and outputs generated power.

[0013] The switching means M1 can be switched between one state in which the generated power generated by the solar cell module 10 is charged into the first storage battery 40 and second discharged power discharged by the second storage battery 50 is output to the output unit 90, and the other state in which the generated power is charged into the second storage battery 50 and discharged power discharged by the first storage battery 40 is output to the output unit 90. The switching means M1 is, for example, a double-pole double-throw toggle switch that can be operated by the user's fingers, and has two poles consisting of a first switching unit 20 and a second switching unit 30.

[0014] The first switching unit 20 has a first common end 21, a first one end 22, and a first other end 23. The first common end 21 can be connected to either the first one end 22 or the first other end 23.

[0015] The first common terminal 21 is connected to the first storage battery 40 .

[0016] The first one end 22 is connected to one end of the solar cell module 10. In one state where the first common end 21 and the first one end 22 are connected to each other, the first switching unit 20 connects the solar cell module 10 and the first storage battery 40 to form a one-way charging path Oc that charges the first storage battery 40 with power generated by the solar cell module 10 (FIG. 2).

[0017] The first other end 23 is connected to the output unit 90 via the rectifier unit 70 and the inverter 60. In the other state where the first other end 23 and the first common end 21 are connected to each other, the first switching unit 20 forms a other discharge path Td that connects the first storage battery 40 and the output unit 90 and outputs power from the output unit 90 using discharge power discharged from the first storage battery 40 (FIG. 3).

[0018] The second switching unit 30 has a second common end 31, a second one end 32, and a second other end 33. The second common end 31 is connected to either the second one end 32 or the second other end 33. The second switching unit 30 is linked to the operation of the first switching unit 20, so that when the first common end 21 and the first one end 22 are connected, the second common end 31 and the second one end 32 are connected, and when the first common end 21 and the first other end 23 are connected, the second common end 31 and the second other end 33 are connected.

[0019] The second common terminal 31 is connected to the second storage battery 50 .

[0020] The second one end 32 is connected to the output unit 90 via the rectifier unit 70 and the inverter 60. In one state where the second common end 31 and the second one end 32 are connected to each other, the second switching unit 30 connects the second storage battery 50 and the output unit 90, forming a one-way discharge path Od that outputs power from the output unit 90 using discharge power discharged from the second storage battery 50 (FIG. 2).

[0021] The second other end 33 is connected to one end of the solar cell module 10. When the second common end 31 and the second one end 32 are connected to each other, the second switching unit 30 forms the other charging path Tc that charges the second storage battery 50 with power generated by the solar cell module 10 (FIG. 3).

[0022] Each of the first storage battery 40 and the second storage battery 50 is, for example, a chargeable and dischargeable secondary battery. The positive electrode of the first storage battery 40 is connected to the first common terminal 21. The positive electrode of the second storage battery 50 is connected to the second common terminal 31. The negative electrode of each of the first storage battery 40 and the second storage battery 50 is connected to the other end of the solar cell module 10.

[0023] The inverter 60 converts DC power into AC power. The inverter 60 is interposed between the switching means M1 and the output unit 90, and converts the discharge power of the first storage battery 40 or the second storage battery 50 input from the switching unit into AC power of, for example, 100 V, and outputs it to the output unit 90.

[0024] The rectifier 70 is, for example, a diode, and is interposed between the switching means M1 and the inverter 60 to allow current to flow from the switching means M1 to the inverter 60.

[0025] The external connection terminals 80 are provided on the positive and negative sides of the inverter 60. The external connection terminals 80 can be connected to other power supply devices P, and can output power combined with the output power of the other power supply devices P to the output unit 90. Furthermore, by connecting other power supply devices P to each other, even if both the one discharge path Od and the other discharge path Td are momentarily disconnected when the switching means M1 is switched, the output is stabilized by receiving power supply from the other power supply devices P.

[0026] The output unit 90 outputs the AC power converted by the inverter 60 to a power supply target.

[0027] (Operation of the first embodiment) When a user operates the switching means M1 with a finger to switch to one state, the first switching unit 20 connects the first common terminal 21 and the first one terminal 22 to form one charging path Oc, and the first storage battery 40 is charged with the power generated by the solar cell module 10. The second switching unit 30, in conjunction with the operation of the first switching unit 20, connects the second common terminal 31 and the second one terminal 32 to form one discharging path Od, and the discharge power discharged by the second storage battery 50 is converted into AC power by the inverter 60 and output from the output unit 90.

[0028] 3, when a user operates the switching means M1 with a finger to switch to the other state, the first switching unit 20 connects the first common terminal 21 and the first other terminal 23 to form the other discharge path Td, and the discharge power discharged by the first storage battery 40 is converted to AC power by the inverter 60 and output from the output unit 90. The second switching unit 30 connects the second common terminal 31 and the second other terminal 33 to form the other charge path Tc, and the second storage battery 50 is charged with the power generated by the solar cell module 10.

[0029] As a result, in one state, when the first storage battery 40 is being charged by the solar cell module 10, the output unit 90 outputs power based on the discharged power of the second storage battery 50, and in the other state, when the second storage battery 50 is being charged by the solar cell module 10, the output unit 90 outputs power based on the discharged power of the first storage battery 40. A user operates the switching means M1 with their finger, waits a predetermined time, and switches between the one state and the other state alternately, so that when one of the first storage battery 40 and the second storage battery 50 is being charged, the other is being discharged, and the output unit 90 can output stable power based on the discharged power of the first storage battery 40 or the second storage battery 50. The predetermined time is, for example, one hour and is adjusted empirically or experimentally.

[0030] According to the first embodiment, the power supply device 1 can more stably supply power generated based on sunlight to a power supply target.

[0031] (Embodiment 2) 4 is a circuit diagram showing an example of a power supply device 2 according to embodiment 2. In the description of the second embodiment, the description of the same configuration as in the first embodiment will be omitted.

[0032] In the first embodiment, the first storage battery 40 is connected to the first common terminal 21 of the first switching unit 20, and the second storage battery 50 is connected to the second common terminal 31 of the second switching unit 30, but the solar cell module 10 may also be connected to the first common terminal 121 and the second common terminal 131.

[0033] The power supply device 2 includes a switching means M2 having a first switching unit 120 and a second switching unit 130. In the first embodiment, in the other state, the first switching unit 20 forms a other-side discharge path Td connecting the first storage battery 40 and the output unit 90, and the second switching unit 30 forms a other-side charge path Tc connecting the solar cell module 10 and the second storage battery 50 (FIG. 3). In the second embodiment, in the other state, the second switching unit 130 forms a other-side discharge path Td connecting the first storage battery 40 and the output unit 90, and the first switching unit 120 forms a other-side charge path Tc connecting the solar cell module 10 and the second storage battery 50 (FIG. 6).

[0034] 4, the first switching unit 120 has a first common end 121, a first one end 122, a first other end 123, a first one electronic switch 124, and a first other electronic switch 125. The first common end 121 can be connected to either the first one end 122 or the first other end 123.

[0035] The first common end 121 is connected to the solar cell module 10 .

[0036] The first one end 122 is connected to a first one-way electronic switch 124 interposed between the solar cell module 10 and the first storage battery 40. More specifically, the first one-way electronic switch 124 is an NPN transistor, and has a base connected to the first one end 122 via a voltage adjustment resistor R, a collector connected to one end of the solar cell module 10, and an emitter connected to the positive electrode of the first storage battery 40.

[0037] The first other end 123 is connected to a first other electronic switch 125 interposed between the solar cell module 10 and the second storage battery 50. More specifically, the first other electronic switch 125 is an NPN transistor, and has a base connected to the first other end 123 via a voltage adjustment resistor R, a collector connected to one end of the solar cell module 10, and an emitter connected to the positive electrode of the second storage battery 50.

[0038] The second switching unit 130 has a second common terminal 131, a second one terminal 132, a second other terminal 133, a second one electronic switch 134, and a second other electronic switch 135. The second common terminal 131 can be connected to either the second one terminal 132 or the second other terminal 133.

[0039] The second common terminal 131 is connected to the output terminal n of each of the second one-side electronic switch 134 and the second other-side electronic switch 135 .

[0040] The second one end 132 is connected to a second one-way electronic switch 134 interposed between the second storage battery 50 and the output unit 90. More specifically, the second one-way electronic switch 134 is a PNP transistor, and has a base connected to the second one end 132 via a voltage adjustment resistor R, an emitter connected to the positive electrode of the second storage battery 50, and a collector connected to the output unit 90 via the output side terminal n, the rectifier unit 70, and the inverter 60.

[0041] The second other end 133 is connected to a second other electronic switch 135 interposed between the first storage battery 40 and the output unit 90. More specifically, the second other electronic switch 135 is a PNP transistor, and has a base connected to the second other end 133 via a voltage adjustment resistor R, an emitter connected to the positive electrode of the first storage battery 40, and a collector connected to the output unit 90 via the output side terminal n, the rectifier unit 70, and the inverter 60.

[0042] 5 and 6 are explanatory diagrams for explaining an example of the current flow in the switching means M2, with FIG. 5 showing one state and FIG. 6 showing the other state.

[0043] As shown in FIG. 5, in the one-state state, when the first common terminal 121 and the first one-side terminal 122 are connected, the first one-side electronic switch 124 conducts electricity between the solar cell module 10 and the first storage battery 40 by the voltage applied to the first one-side terminal 122, forming a one-side charging path Oc.

[0044] In addition, in the one-way state, when the second common terminal 131 and the second one-way terminal 132 are connected, the second one-way electronic switch 134 conducts electricity between the second storage battery 50 and the output unit 90, forming a one-way discharge path Od.

[0045] As shown in Figure 6, in the other state, when the first common terminal 121 and the first other terminal 123 are connected, the first other electronic switch 125 conducts electricity between the solar cell module 10 and the second storage battery 50 using the voltage applied to the first other terminal 123, thereby forming the other charging path Tc.

[0046] Also, in the other state, when the second common terminal 131 and the second other terminal 133 are connected, the voltage applied to the second other terminal 133 via the output side terminal n causes the second other electronic switch 135 to conduct electricity between the first storage battery 40 and the output section 90, forming the other discharge path Td.

[0047] (Configuration of embodiment 3) The switching means M1 in the first embodiment and the switching means M2 in the second embodiment can be switched by the user's fingers, but may also be driven by a drive unit V for switching.

[0048] 7 is a circuit diagram showing an example of a power supply device 3 according to the third embodiment. In the description of the third embodiment, the description of the same configuration as in the first and second embodiments will be omitted.

[0049] The power supply device 3 includes a switching means M3 having a first switching unit 220 and a second switching unit 230, and a drive unit V.

[0050] As shown in FIG. 7, the first switching unit 220 has a first one-side driving switch 221, a first other-side driving switch 222, a first one-side electronic switch 224, and a first other-side electronic switch 225.

[0051] The first one-way drive switch 221 is connected to each of the first one-way electronic switches 224 interposed between the solar cell module 10 and the first storage battery 40 via a resistor R for adjusting the voltage.

[0052] The first other-side driving switch 222 is connected to each of the first other-side electronic switches 225 interposed between the solar cell module 10 and the second storage battery 50 via a resistor R for voltage adjustment.

[0053] The second switching unit 230 has a second one-side drive switch 231, a second other-side drive switch 232, a second one-side electronic switch 234, and a second other-side electronic switch 235.

[0054] The second one-way drive switch 231 is connected to each of the second one-way electronic switches 234 interposed between the second storage battery 50 and the output unit 90 via a resistor R for voltage adjustment.

[0055] The second other driving switch 232 is connected to each of the second other electronic switches 235 interposed between the first storage battery 40 and the output section 90 via a resistor R for voltage adjustment.

[0056] The first one-side electronic switch 224, the first other-side electronic switch 225, the second one-side electronic switch 234, and the second other-side electronic switch 235 are connected in groups of three in parallel so as to suppress a temperature rise.

[0057] FIG. 8 is a block diagram showing an example of the drive unit V in the power supply device 3.

[0058] 8, the drive unit V has a manual / automatic switching device 241, a manual driving device 242, and an automatic driving device 243. The first one-way driving switch 221, the first other-way driving switch 222, the second one-way driving switch 231, and the second other-way driving switch 232 are each a relay switch that is controlled to an on state or an off state by a driving current output from the drive unit V. When the first one-way driving switch 221 and the first other-way driving switch 222 are each turned on, they apply a voltage supplied from the solar cell module 10 to the first one-way electronic switch 224 and the first other-way electronic switch 225, respectively. When the second one-way driving switch 231 and the second other-way driving switch 232 are each turned on, they apply a voltage supplied from the output terminal n to the second one-way electronic switch 234 and the second other-way electronic switch 235, respectively.

[0059] The manual / automatic switching device 241 receives power from the positive and negative terminals of the inverter 60 via a DC-AC converter 244 and an AC-DC converter 245. The manual / automatic switching device 241 can be switched by the user's fingers, and when switched to manual operation, it connects to a manual operation device 242 and outputs a drive current, and when switched to automatic operation, it connects to an automatic operation device 243 and outputs a drive current.

[0060] The manual driving device 242 is enabled when the manual / automatic switching device 241 switches to manual driving. The manual driving device 242 is, for example, a double-pole double-throw toggle switch. In response to a switching operation by the user, the manual driving device 242 outputs a driving current such that in one state, when the first one-way driving switch 221 and the second one-way driving switch 231 are turned on, the first other-way driving switch 222 and the second other-way driving switch 232 are turned off, and in the other state, when the first one-way driving switch 221 and the second one-way driving switch 231 are turned off, the first other-way driving switch 222 and the second other-way driving switch 232 are turned on, so that the one state and the other state alternate.

[0061] The automatic driving device 243 is enabled when the operation mode is switched to automatic driving by the manual / automatic switching device 241. The automatic driving device 243 has a timer (not shown) and outputs a drive current to each of the first one-way drive switch 221, the first other-way drive switch 222, the second one-way drive switch 231, and the second other-way drive switch 232 so that the one state and the other state alternate after a predetermined time interval.

[0062] 9, in the one-state state, when the first one-way drive switch 221 is turned on and the first other-way drive switch 222 is turned off, the first one-way electronic switch 224 establishes conduction between the solar cell module 10 and the first storage battery 40, forming a one-way charge path Oc. In the one state, when the second one-way drive switch 231 is turned on and the second other-way drive switch 232 is turned off, the second one-way electronic switch 234 establishes conduction between the second storage battery 50 and the output unit 90, forming a one-way discharge path Od.

[0063] 10 , in the other state, when the first one-side drive switch 221 is turned off and the first other-side drive switch 222 is turned on, the first other-side electronic switch 225 conducts electricity between the solar cell module 10 and the second storage battery 50, forming the other-side charging path Tc. In the other state, when the second one-side drive switch 231 is turned off and the second other-side drive switch 232 is turned on, the second other-side electronic switch 235 conducts electricity between the first storage battery 40 and the output unit 90, forming the other-side discharging path Td.

[0064] As described above, the embodiments of the present invention have been described, but the embodiments are not limited to these, and various changes, modifications, etc. are possible within the scope that does not change the gist of the present invention.

[0065] For example, in the embodiment, an example has been described in which the natural energy power generation device is a solar cell module 10, but this is not limited to this, and the natural energy power generation device may be a device that can convert natural energy into electricity, such as a solar thermal power generation device, a wind power generation device, a hydroelectric power generation device, a geothermal power generation device, or a biomass power generation device.

[0066] In the embodiment, an example has been described in which the switching means M1 is a double-pole double-throw toggle switch, but this is not limited to this, and the switch may have a first pole having a first one end 22, 122 and a first other end 23, 123, and a first common end 21, 121 connected to either the first one end 22, 122 or the first other end 23, 123, a second pole having a second one end 32, 132 and a second other end 33, 133 linked to the first pole, and a second common end 31, 131 connected to either the second one end 32, 132 or the second other end 33, 133, or it does not have to be a double-pole double-throw switch.

[0067] In the embodiment, an example has been described in which the inverter 60 converts the discharge power into 100V AC power, but the voltage is not limited to 100V and the inverter 60 may convert the discharge power into AC power of another voltage. Also, the inverter 60 is not necessarily required, and DC power based on the discharge power may be output from the output unit 90.

[0068] In the embodiment, the drive unit V has been described as having a configuration including a manual / automatic switching device 241, a manual operation device 242, and an automatic operation device 243, but is not limited to this. All or part of the power supply devices 1, 2, and 3 and the drive unit V may realize their functions by a CPU reading a program from a storage unit, or may realize their functions by an FPGA or the like.

[0069] That is, the power supply devices 1, 2, and 3 have switching means M1, M2, and M3 that can switch between one state in which the generated power generated by a natural energy power generation device that generates power by converting natural energy into electricity is charged into the first storage battery 40, and the second discharged power discharged by the second storage battery 50 is output to the output unit 90, or the other state in which the generated power is charged into the second storage battery 50, and the discharged power discharged by the first storage battery 40 is output to the output unit 90.

[0070] The switching means M1, M2, M3 have a first switching unit 20, 120, 220 and a second switching unit 30, 130, 230. In one state, the first switching unit 20, 120, 220 forms a one-side charging path Oc connecting the natural energy power generation device and the first storage battery 40, and the second switching unit 30, 130, 230 forms a one-side discharging path Od connecting the second storage battery 50 and the output unit 90. In the other state, either the first switching unit 20, 120, 220 or the second switching unit 30, 130, 230 forms a other-side discharging path Td connecting the first storage battery 40 and the output unit 90, and the other of the first switching unit 20, 120, 220 or the second switching unit 30, 130, 230 forms a other-side charging path Tc connecting the natural energy power generation device and the second storage battery 50.

[0071] The first switching unit 20 has a first common terminal 21, a first one terminal 22, and a first other terminal 23. The first common terminal 21 is connected to the first storage battery 40 and can be connected to either the first one terminal 22 or the first other terminal 23. The first one terminal 22 is connected to the natural energy power generation device. The first other terminal 23 is connected to the output unit 90. In the one state, by connecting the first common terminal 21 and the first one terminal 22, a one charging path Oc is formed that charges the first storage battery 40 with power generated by the natural energy power generation device. In the other state, by connecting the first common terminal 21 and the first other terminal 23, a other discharging path Td is formed that outputs discharged power discharged by the first storage battery 40 to the output unit 90.

[0072] The second switching unit 30 has a second common end 31, a second one end 32, and a second other end 33. The second common end 31 is connected to the second storage battery 50 and can be connected to either the second one end 32 or the second other end 33. The second one end 32 is connected to the output unit 90. The second other end 33 is connected to the natural energy power generation device. In the one state, a one discharge path Od is formed by connecting the second common end 31 and the second one end 32. In the other state, a other charge path Tc is formed by connecting the second common end 31 and the second other end 33.

[0073] The first switching unit 120 has a first common terminal 121, a first one-side terminal 122, a first other-side terminal 123, a first one-side electronic switch 124, and a first other-side electronic switch 125. The first common terminal 121 is connected to the natural energy power generation device and can be connected to either the first one-side terminal 122 or the first other-side terminal 123. The first one-side terminal 122 is connected to a first one-side electronic switch 124 interposed between the natural energy power generation device and the first storage battery 40. The first other-side terminal 123 is connected to the first other-side electronic switch 125 interposed between the natural energy power generation device and the second storage battery 50. In the one-side state, when the first common terminal 121 and the first one-side terminal 122 are connected, the first one-side electronic switch 124 conducts electricity between the natural energy power generation device and the first storage battery 40, forming a one-side charging path Oc. In the other state, when the first common terminal 121 and the first other terminal 123 are connected, the first other electronic switch 125 conducts electricity between the natural energy power generation device and the second storage battery 50, and the other charging path Tc is formed.

[0074] The second switching unit 130 has a second common terminal 131, a second one-side terminal 132, a second other-side terminal 133, a second one-side electronic switch 134, and a second other-side electronic switch 135. The second common terminal 131 is connected to the output terminal n of each of the second one-side electronic switch 134 and the second other-side electronic switch 135, and is connectable to either the second one-side terminal 132 or the second other-side terminal 133. The second one-side terminal 132 is connected to the second one-side electronic switch 134 interposed between the second storage battery 50 and the output unit 90. The second other-side terminal 133 is connected to the second other-side electronic switch 135 interposed between the first storage battery 40 and the output unit 90. In the one-side state, when the second common terminal 131 and the second one-side terminal 132 are connected, the second one-side electronic switch 134 conducts electricity between the second storage battery 50 and the output unit 90, forming a one-side discharge path Od. In the other state, when the second common terminal 131 and the second other terminal 133 are connected, the second other electronic switch 135 conducts electricity between the first storage battery 40 and the output unit 90, and the other discharge path Td is formed.

[0075] The first switching unit 220 has a first one-way drive switch 221, a first other-way drive switch 222, a first one-way electronic switch 224, and a first other-way electronic switch 225. The first one-way drive switch 221 is connected to the first one-way electronic switch 224 interposed between the natural energy power generation device and the first storage battery 40. The first other-way drive switch 222 is connected to the first other-way electronic switch 225 interposed between the natural energy power generation device and the second storage battery 50. In the one-way state, when the first one-way drive switch 221 is turned on and the first other-way drive switch 222 is turned off, the first one-way electronic switch 224 conducts electricity between the natural energy power generation device and the first storage battery 40, forming a one-way charging path Oc. In the other-way state, when the first one-way drive switch 221 is turned off and the first other-way drive switch 222 is turned on, the first other-way electronic switch 225 conducts electricity between the natural energy power generation device and the second storage battery 50, forming a other-way charging path Tc.

[0076] The second switching unit 230 has a second one-way drive switch 231, a second other-way drive switch 232, a second one-way electronic switch 234, and a second other-way electronic switch 235. The second one-way drive switch 231 is connected to the second one-way electronic switch 234 interposed between the second storage battery 50 and the output unit 90. The second other-way drive switch 232 is connected to the second other-way electronic switch 235 interposed between the first storage battery 40 and the output unit 90. In the one-way state, when the second one-way drive switch 231 is turned on and the second other-way drive switch 232 is turned off, the second one-way electronic switch 234 conducts electricity between the second storage battery 50 and the output unit 90, forming a one-way discharge path Od. In the other-way state, when the second one-way drive switch 231 is turned off and the second other-way drive switch 232 is turned on, the second other-way electronic switch 235 conducts electricity between the first storage battery 40 and the output unit 90, forming a other-way discharge path Td.

[0077] The power supply devices 1, 2, and 3 each have an inverter 60 that converts DC power into AC power. The inverter 60 is interposed between the switching means M1, M2, and M3 and an output unit 90, and the output unit 90 outputs the AC power.

[0078] The power supply devices 1, 2, and 3 each have an external connection terminal 80 and a rectifier 70. The rectifier 70 is interposed between the switching means M1, M2, and M3 and the inverter 60. The external connection terminal 80 is provided on each of the positive and negative sides of the inverter 60. [Explanation of symbols]

[0079] 1...Power supply device 2...Power supply 3...Power supply device 10. Solar cell module 20 First switching section 21...1st common end 22 First one end 23...1st other end 30 Second switching section 31...2nd common end 32 Second one end 33...Second other end 40 First storage battery 50 Second storage battery 60 ···Inverter 70... Rectifier section 80 External connection terminal 90 Output section 120···First switching unit 121...1st common end 122...First one end 123...1st other end 124 First one-way electronic switch 125···First other electronic switch 130 Second switching section 131...2nd common end 132... Second one end 133...Second other end 134 Second one-way electronic switch 135... Second other electronic switch 220···First switching unit 221 First one-way drive switch 222... First other side drive switch 224 First one-way electronic switch 225···First other electronic switch 230 Second switching section 231 Second one-way drive switch 232 Second other driving switch 234 Second one-way electronic switch 235... Second other electronic switch 241...Manual automatic switching device 242 Manual operation device 243 Automatic driving device 244···DC-AC converter 245···AC-DC converter Oc: One-way charging path Od One-way discharge path Tc: Other charging path Td: Other discharge path M1: Switching means M2...Switching means M3...Switching means n Output terminal P Other power supplies R...Resistance V...Driver

Claims

1. A power supply device having a switching means that can switch between one state in which generated power generated by a natural energy power generation device that generates power by converting natural energy into electricity is charged into a first storage battery, and second discharged power discharged by a second storage battery is output to an output unit, or another state in which the generated power is charged into the second storage battery, and discharged power discharged by the first storage battery is output to the output unit.

2. The switching means has a first switching unit and a second switching unit, In the one state, the first switching unit forms a one-way charging path connecting the natural energy power generation device and the first storage battery, the second switching unit forms a one-way discharge path connecting the second storage battery and the output unit, In the other state, One of the first switching unit and the second switching unit forms a second discharge path connecting the first storage battery and the output unit, the other of the first switching unit and the second switching unit forms a second charging path connecting the natural energy power generation device and the second storage battery; The power supply device of claim 1 .

3. The first switching unit is a first common end, a first one end, and a first other end; the first common terminal is connected to the first storage battery and can be connected to either the first one terminal or the first other terminal; the first one end is connected to the natural energy power generation device, the first other end is connected to the output portion, In the one state, the first common end and the first one end are connected to form the one charging path for charging the first storage battery with the power generated by the natural energy power generation device; In the other state, the first common terminal and the first other terminal are connected to form the other discharge path that outputs discharge power discharged by the first storage battery to the output unit; The second switching unit is a second common end, a second one end, and a second other end; the second common terminal is connected to the second storage battery and can be connected to either the second one terminal or the second other terminal; the second one end is connected to the output section, the second other end is connected to the natural energy power generation device, In the one state, the second common end and the second one end are connected to form the one discharge path; In the other state, the second common end and the second other end are connected to form the other charging path. The power supply device according to claim 2 .

4. The first switching unit is a first common end, a first one end, a first other end, a first one electronic switch, and a first other electronic switch; the first common end is connected to the natural energy power generation device and can be connected to either the first one end or the first other end; the first one end is connected to the first one electronic switch interposed between the natural energy power generation apparatus and the first storage battery, the first other end is connected to the first other electronic switch interposed between the natural energy power generation device and the second storage battery, In the one state, when the first common terminal and the first one terminal are connected, the first one electronic switch conducts electricity between the natural energy power generation apparatus and the first storage battery to form the one charging path; In the other state, when the first common terminal and the first other terminal are connected, the first other electronic switch conducts electricity between the natural energy power generation device and the second storage battery to form the other charging path; The second switching unit is a second common end, a second one end, a second other end, a second one electronic switch, and a second other electronic switch; the second common end is connected to an output terminal of each of the second one-side electronic switch and the second other-side electronic switch, and is connectable to either the second one-side end or the second other-side end; the second one end is connected to the second one end electronic switch interposed between the second storage battery and the output unit, the second other end is connected to the second other electronic switch interposed between the first storage battery and the output unit, In the one state, when the second common terminal and the second one terminal are connected, the second one electronic switch conducts the second storage battery and the output unit to form the one discharge path; In the other state, when the second common terminal and the second other terminal are connected, the second other electronic switch conducts the first storage battery and the output unit to form the other discharge path. The power supply device according to claim 2 .

5. The first switching unit is a first one-way driving switch, a first other-way driving switch, a first one-way electronic switch, and a first other-way electronic switch; the first one-way drive switch is connected to the first one-way electronic switch interposed between the natural energy power generation device and the first storage battery; the first other-side driving switch is connected to the first other-side electronic switch interposed between the natural energy power generation device and the second storage battery, In the one state, when the first one-side drive switch is turned on and the first other-side drive switch is turned off, the first one-side electronic switch conducts electricity between the natural energy power generation device and the first storage battery to form the one-side charging path, In the other state, when the first one-side drive switch is turned off and the first other-side drive switch is turned on, the first other-side electronic switch conducts electricity between the natural energy power generation device and the second storage battery to form the other-side charging path, The second switching unit is a second one-way driving switch, a second other-way driving switch, a second one-way electronic switch, and a second other-way electronic switch; the second one-way driving switch is connected to the second one-way electronic switch interposed between the second storage battery and the output unit; the second other driving switch is connected to the second other electronic switch interposed between the first storage battery and the output unit, In the one state, when the second one-way driving switch is turned on and the second other-way driving switch is turned off, the second one-way electronic switch conducts the second storage battery and the output unit to form the one-way discharge path; In the other state, when the second one-side driving switch is turned off and the second other-side driving switch is turned on, the second other-side electronic switch conducts the first storage battery and the output unit to form the other-side discharge path. The power supply device according to claim 2 .

6. An inverter converts DC power into AC power, the inverter is interposed between the switching means and the output section, The output unit outputs AC power. The power supply device of claim 1 .

7. It has a rectification section and external connection terminals, the rectifier unit is interposed between the switching means and the inverter, The external connection terminals are provided on the positive and negative sides of the inverter, respectively.

7. The power supply device according to claim 6.

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